diff --git a/package.json b/package.json
index 697d4b1..65ce929 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
 		"rollup": "^0.41.4",
 		"rollup-plugin-git-version": "0.2.1",
 		"rollup-plugin-json": "^2.1.0",
-		"uglify-js": "~2.3.6"
+		"uglify-js": "~3.8.0"
 	},
 	"peerDependencies": {
 		"leaflet": "~1.0.3"